Apparatus for recovery of ingredients of oily ink.



S. HOPKINS & C. It. BARNETT. APPARATUS PoR RECOVERY 0E INGREDIENTS 0EoILY INK.

APPLICATION FILED JULY 25. 1908.

Patented Aug. 31, 1909.

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[Nl/ENTOR I .S Mojo/1W g l or'ney /T/VESSES M. S. HOPKINS & C. R.BARNETT. APPARATUS FOR RECOVERY 0Fl INGREDIENTS 0F OILY INK. APPLIoATIoNFILED JULY 25, 190s.

Patented Aug. 31, 1909.

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UNITED sTATEs PATENT oEEicE.

MATTHEW S. HOPKINS AND CHARLES RIDGELY BARNETT, 0F RLAND PARK, MARYLAND.

APPARATUS FOR RECOVERY 0F INGREDIENTS OF OILY INK.

Specification of Letters Patent.

Application fuea Ju1y25, 190s. serial No. 445,376.

To all whom 'it may concern: l

Be it known that we, MATTHEW S. Hor- KINs and CHARLES R. BARNETT, ofRoland Park, in the State of Maryland, have invented certain new anduseful Improvements in Ap aratus for the Recovery of Ingredients ofJ0ily Ink; and We do hereby declare the following to be a full, clear,and exact description of the invention, such -as will enable othersskilled in the art and the. solvent separately.

With this object in view, the invention consists in certain novelfeatures of construction and combinations and arrangements of parts ashereinafter set forth and A pointed out in the claims.

In the accompanying drawings; Figure 1 is a view of an apparatusembodying our irnprovements; Fig. 2 is a sectional view' of the washingmachine; Fig. 3 is a sectional view of the condenser; Fig. 4 is asectional View of the still, and Fi .'5 is a fragmentary sectional viewof the lter press.

For the purpose of removing ink fromcloths used for wipingengravingplates it has heretofore been proposed to wash lhe cloths in a solvent,such as naphtha, so that i' the resulting liquorfwill consist -ofvnaphtha carrfying in solution or suspension, the pigment and oil ofwhich the ink was composed. rlhe constitutents of this liquor arevaluable when properly separated .and recovered, but heretofore,,difficulty has been experienced in filtering the pigment from the oil,and as the latter is the most valuable ingredient of the liquor, it ishighly desirable to efectually separate all of the pigment thereform.Experience has demonstrated that if ltheliquor be passed (withoutprevious chemical treatment) through a filter press, the latter willfail to eifectuallyy separate the pigment from the oil, and it is'therefore important to so treat the liquor as to destroy the viscousquality of the oil and n form a precipitate capable of carrying down thepigment, which can then be fully separated from the oil and solvent withthe use of a filter press.

In carrying our invention into effect, we-

place the cloths or other material containing ink or other oily pigment,in a washing machine 1, and agitate them in the presence of a suitablesolvent, such for example, as benzin, ethers, esters, carbontetrachlorid,

chloroform, carbon bi-sulid, naphtha, tur-y pentine or other oilsolvent.

The washing machine may consist. of a body portion having a steam jacket2 with which steam inlet Aand exhaust pipes 3-4 communicate, and anopen-work revoluble drum 5 to contain the cloths. The body portion ofthe machine is provided with a door' 6 and the drum is similarlyprovided with a door 7. Onejournal of the drum 5 may be provided with apulle 8 to which motion istransmitted by a be t 9 from a pulley 10 on aline shaft 11.

After the cloths have been treated for ten minutes (more or less) withbenzin or other storage tank 18. A valve 19 is provided in the pipe 17and a similar valve 20 is provided inthe pipe 15 for controlling thepassage of solvent to the washing machine.

Afterthe cloths have been treated and the liquor (consisting of solvent,.pigment and oil) has been run into the tank 14 as above described, thevalve. 13 will be closed and the valves 19-20 opened. Thepump 16 willnow be operated to force more solvent linto the washing machine for thefurther treatment of the cloths; after which the liquor will be run intothe tank 14 as before. This operation may be repeated several times ifnecessary.

The interior `of the washing machine is connected, by a pipe 21, (havinga valve22) with a pipe 23 which communicates with a condenser '24, andthe latter communicates through the medium of a pipe 26 with a vacuumpump 25 as hereinafter more fully explained. The vacuum pump may bedriven by belt gearin from the line shaft 11.

When the coths have been treated with yvolatile solvent in the washingmachine as Patented Aug. ai, 1909.

/ before explained, heat afforded by the steam remove the Jacket oft-heI machine will serve to volatilize any solvent remaining in thecloths, and by opening the valve 22, these vapors Will be drawn throughthe pipe 21 by the operation of the vacuumjpump, and Will be condensedin .their passage through the condenser 24, the resulting condensedsolvent finally reaching the storage tank 18, in a manner which will beexplained further on. The cloths may now be removed from the Washing`machine, and subjected to a Washing in Water if desired.

An agitator 27 is located Within the tank 14 and the shaft of thisagitator may be driven from the line shaft 11, through the medium ofsuitable gearing 28. The cover 29 of the tank 14 and is provided Withunnels 30-31` to mit the introduction of tank.

While the liquor in the tank is undergoing agltation, We treat the samewith a substance or reagent, such as cla infusorial earth, carbon,precipitated sollds, or alcoholic or ethereal solutions of all reagentscapable of entering into combination 4with a second substance Which isintroduced in such a Way as to form a precipitate the nature of whichwill render the insoluble matter capable of mechanicall separation fromthe oil and solvent. We have found that an alcoholic solution of calciumchlorid, or lead acetate will serve efiiciently for the reagent firstintroduced into the tank 14 with the liquor, and that the substancesubsequently introduced during agitation of the material and which Willcause a precipitate containing the plgment in the liquor that can bemechanically filtered or separated from theli uor Pe?" chemlcals intosaid and a solvent, may be a chemically equ1va solution of sulfuric acidlent amount of a and alcohol. The liquor contained` in the tank 14 Willbe thoroughly agitated With the reagents above referred to until theprecipitate is such as can be filtered through an ordinary filter ress,or Which can be se arated from the uid by any other mechanical means.

The failure of liquor to properly filter to treated as above described,is believeds to be due, not so much to the nature of the pigment as itis to the viscous character'of the carrier, and We have discovered thatWith the use of materials such as ethers, esters, solvent naphtha,alcoholic solutions of soap etc., such viscous property of the liquor isdestroyed vand thus mechanical separation of the carrier and pigment isrendered possible. Thetank 14 is connected by means of a pipe 32 havinga valve 33, with a pump 34 and the latter is connected by a pipe 35having a valve 36 with a filter press 37. The plates of this filterpress are provided Witli ma rest loosely thereon Vacuum -the stillthrough the 24, and such passage of the vapor from the still will beaugmented by the action of the pigment, Without being first chambers 38through which 'steam (from a steam supply pipe 39) is circulated forheating the press. A pipe 40 connects the filter press with a tank 41,and With this pipe, one end of a pipe 42 connnu1iicates,-the other endof the pipe 42 being connected with the pipe 23, and, through thelatter, with the condenser and vacuum pump. The pipe 40 is provided witha valve 43, and in the pipe 42, a valve 44 is located.

When theliquor in the tank 14 has been treated as before explained thevalves 33 and 36 Will be opened-and the pump 34 operated to cause theliquor containing the precipitate to flow to and through the filtersisting very largely of pigment will be ar; rested by the filter press,While the fluid Will leave the filter press by the pipe 40 (the valve 43being open and the valve/44 closed) and enter the tank 41. The valves 36and 43 will noW be closed and valve 44 opened. Steam will be permittedto circulate throu h the filter platesand supply heat which Wlllvolatilize any solvent which may remain with t-he precipitate in' thefilter press. The pump 25 Will be operated, and the volatili'zed solventwill. be drawn from the filter, through the pipe 40 and, after beingcondensed by passage through the condenser, Will find its Way into thestorage tank 18. Thus the precipitate Will be dried in the filter pressand any solvent which may have .remained with it will be recovered. The

solution containin the heavy oil now in the tank 41, will be dlschargedthrough a pipe 45 (having a valve 46) into a still 47. This still ismade with a steam jacket 48 with Which steam pipes 4 9-50 communicate,and said still may also be provided with a steam coil 51 for supplyingheat to drive off the volatile solvent contained in the fluid, and

leave t-he only 'remaining ingredient of the fluid,-heavy oil,-in thebot-tom of the still, from which it can be Withdrawn through avalveddischarge pipe 52.

The vaporized so vent will escape from pipe 23 to the condenser vacuumpump 25. With the.. use of the vacuum pump to Withdraw lthe vaporizedsolvent from the still, less heat will be required to vaporize thesolvent and hence the oil which remainsI in the still will not be undulydarkened, asmight be the case if more excessive heat Were employed andthe lise ofthe vacuum pump omitted.

The condenser 24 comprises a shell having a Water /jacket 53 with whichcirculation pipes 54-55 communicate. The condenser also contains a drum56. having its lower end open and its upper end 57 closed a shortdistance below lthe lower end of the inlet pipe 23. A water cooling coil58 may be located in the condenser around thedrum 56 and drum 56 andterminating near the upper closed end of the latter. Any uncondensedvapors in the condenser 24 (which has been found to be approximately oneper cent.) ivill find exit through the pipes (i1-26 to the vacuum pump,and WilleXhaust from the latter, through a pipe `62, to a secondcondenser G3. The construction of the condenser 63 may bethe same asthat of the condenser 24, and may, if desired, be provided With a safetyvalve 64. The lower end of the condenser G3 communicates with thestorage tank 18, through the medium of a pipe 65 having al valve 66. v

The major portion of the condensation of vaporized solvent will occur inthe condenserA 24, but as this condenser is in the circuit of the vacuumpump, the condensed solvent will not flow by gravity from the bottom ofsaid condenser 24. In order, therefore, to remove the condensed solventfrom the condenser 24 to the solvent storage tank 18, a pump 67 isemployed. The bottom of the condenser 24 is connected, byia valved pipeG8 -with the pump 67, and the latter is connected, by a pipe 69 with thesolvent storage tank 18.

Having fully described our invention What we claim as new and desire tosecure by Letters-Patent, is

1. In apparatus of the character described, the combination of means'fortreating material containing oily pigment with a solvent to remove saidoily pigment, a container to receive the resultant liquor, means foragitating the liquor in said container, means for introducing chemicalsinto said container to form a precipitate containing pigment, means formechanically separating the precipitate containing the pigment-from theliquor, and means for separating the solvent from the remaining flu1d torecover the oil.

2. In apparatus of the character described, the combination of means fortreating material containing oily pigment With a solvent, means fortreating the resultant liquor lto form a precipitate therein containingthe pigment, means for mechanically separating the precipitate from theliquor, means for treatingthe remaining iiuid to vaporize the solventand recover the oil, means for con- (lensing the vapor, and means forrecovering 'the condensed solvent.

3. In apparatus of the character described,

the combination of means for treating materia] containing oily pigmentwith a volatile solvent,y means for treatin the resultant liquorchemically to form a precipitate containing pigment, means formechanically separating the precipitate from the liquor, means fortreating the remaining fluid to vaporize the solvent a'nd recover theoil, means for condensing the vapor, means for recovering the condensedsolvent and means for forclng the condensed solvent to thefirst-mentioned means.

4. In apparatus of the character described,

4the combination of a mechanical cloth-Washing machine to contain avolatile solvent and material containing oily pigment, means forremoving the liquor from the Washing machine, a filter press, means `forforcing the liquor through the filter press to remove precipitatecontaining the pigment, means for heating the filter press, a vacuumpump Iconnected with the filter press to remove vaporized solvent fromthe latter, and means for condensing said vaporized solvent.

5. In apparatus of the character described, the combination of a Washingmachine to contain a volatile solvent and material containing oilypigment, means for Withdrawing the liquor from the Washing machine,means for treating said liquor to remove the pigment therefrom, a stillto receive the relnaining fluid, a condenser for condensing vaporizedsolvent driven off by the still, means for recovering the oil remainingin the stilland meansfor recovering the solvent from the condenser.

6. In apparatus of the character described, the combination 0f a Washingmachine to contain a volatile solvent and material containing oilypigment, means for Withdrawing liquor from the Washing machine, meansfor treating the liquor to vremove the pigment, a still to receive theremaining fluid, a condenser communicating with the still to receivevaporized solvent from the latter, means for recovering oil from thestill, and a vacuum ump for augmenting the passage of vaporized solventfrom the still to the condenser. v

7. In apparatus of the character described, the combination of a Washingmachine to contain a volatile solvent and material containing oilypigment, means for Withdrawing the liquor from the Washing machine,means for treating said liquor torecover the pigment therefrom, a stillto receive the remainingfluid, a condenser communicating with the stillto receive vaporized solvent from the latter, a vacuum pump connectedwith said condenser, means for recovering oil from the still and meansfor recovering condensed solvent from the condenser.

8. In apparatus of the character described, the combination of a washingmachine to contain a volatile solvent and material c ontaining an oilypigment, means for withdrawing the liquid from the Washing ma` 9. Inapparatus of the character described,

the combination with a Washing machine, of a tank communicatingtherewith, means for agitating liquor in said tank, a mechanical filter,a pump for forcing liquor from said tank through the mechanical filter,a still communicating with said filter, a condenser communicating withsaid still, a storage tank communicating with the condenser, and meansfor forcing Huid from said storage tank to the Washing machine.

In testimony whereof, We have signed this specification in the presenceof two subscribing Witnesses.

MATTHEW S. HOPKINS. CHARLES RIDGEL'Y BARNETT.

-- Witnesses:

LEWIS N. HoPKiNs, Jr., JOSEPH T. BYRNE.

